AWS Step Function keyerror

Question

I am following this guide to send approval emails to myself: https://aws.amazon.com/blogs/aws/using-callback-urls-for-approval-emails-with-aws-step-functions/

The code in this guide is exactly the same as mine & I have given this input to the step function:

{
  "name": "TestName"
}

Every time I try to run the step function, i get the following error: Error

KeyError Cause

{
  "errorMessage": "'urls'",
  "errorType": "KeyError",
  "stackTrace": [
    "  File \"/var/task/lambda_function.py\", line 35, in lambda_handler\n    urls = json.loads(response['Payload'].read())['urls']\n"
  ]
}

Its referring to this line: urls = json.loads(response['Payload'].read())['urls'] this line is part of the code that is in the AWS Lambda function.

What does this error mean, What can I do to fix this?

Answer 1

I have never tested that Lambda/Python end to end doc so i cannot tell if you it works. However, this one definitely works. It invokes multiple AWS Services via a Lambda function and does include sending email messages. It uses the Java V2 AWS SDK.

Using AWS Step Functions and the AWS SDK for Java to build workflows that sends notifications over multiple channels